I like to keep up to date, but also I realize there is a TON of work to get massive mods like this working properly.
I see there is an experimental 1.10 mod now (or at least a Jenkins thread). There is also a 1.9, and I've been running 1.8.9.
1. Should I stick to 1.8.9 due to lack of bugs? Should I move to latest version after 1 month because most bugs will be at least at the same level as my version?
2. If I move, should I expect to lose my world? (given versions mentioned at time of writing, above)